Collapsible bed.



H. AGKERMANN.

GOLLAPSIBLE BED.

APPLIOATION TILED JULY 7, 1909.

Patented Mar.'7, 1911.-

3 SHEETS-SHEET 1.

fie ran for:

H. AGKERMANN.

GOLLAPSIBLE BED. APPLIOATION I'ILED Jun, 1909 96, 1 1 7n Patented Mar.7, 1911.

a SHEETS-SHEET 2.

H. AOKBRMANN.

OOLLAPSIBLE BED.

APPLIOATION FILED JULY 7, 1909. v

Patented Mar.7,1911.

3 SHEETS-SHEET 3.

HEINRICH ACKERMANN, OF BERLIN, GERMANY.

COLLAPSIBLE BED.

Specification of Letters Patent.

Application filed July 7, 1909.

Patented Mar. 7, 1911.

Serial No. 506,385.

To all whom it may concern Be it known that I, Hammer-r Aoirnn- MANN, asubject of the King of Prussia, and resident of 13/44:lVarschauerstrasse, Berlin, German Empire, have invented certain new anduseful Improvements in Collapsible Beds, of which the following is aspecification.

This invention relates to a collapsible bed composed of profile ironsand is especially applicable for beds used in military barracks andlarge institutions.

The objectof the present invention is to provide a strong structure of acollapsible bed which may be stored in a compact space when not in useand may be transported in a compact condition.

The novelty of the present invention will be more readily understoodfrom the following detailed description of the form illus trated in theaccompanying drawings.

In these drawings, Figure 1 is a side elevation with the right-hand endpartly in section of a bed-stead according to the present invention,Fig. 2 illustrates the bed-stead in the collapsed position which itoccupies during transport, Fig. 3 is a plan of the bedstead illustratedin Fig. 1, the right-hand post being shown in section on the line 3-3 ofFig. 1, Fig. 4: illustrates the bed-stead shown in Fig. 1 in anothercollapsed posi tion suitable for storing when the bed is not in use,Fig. 5 shows the bed-stead in yet another collapsed position, Fig. 6 isa detail side elevation shown to a larger scale than that given in Fig.1 and showing the arrangement of the hinges of the side bars of themattress frame, Fig. 7 is a plan of the parts shown in Fig. 6, Fig. 8 isan enlarged sectional View of the bed in the collapsed positionillustrated in Fig. 4. The diagonal links hereinafter described havebeen omitted in Fig. 8.

In carrying the invention into eifect according to the form shown thevertical. end posts 9 are of U-section, the parallel flanges of whichface toward the bed. The mattress frame 10 has side bars 11 providedwith hooked ends 12. In the form shown the hooked ends 12 are upwardlybent and the heel or angles of the hooked ends rest on blocks 13 whichare fixed between the parallel flanges of the vertical bed posts.Arranged to slide between the parallel flanges of the bed posts thereare bolts let, see Fig. 8, which are provided with slots 15 engagingover pins 16. The bolt 1-1 is also guided by a pin 17. The bolt 14engages over the upwardly hooked end 12 of the side bars 11.

The side bars 11 are connected to the vertical posts 9 by means ofdiagonal links 18 which are pivoted both to the side bars 11 and thevertical posts 9. Arranged at the bottom of the vertical posts 9 thereare slidable bolts 19 which are guided between the pan allel flanges ofthe vertical bed posts and also by means of a pin 20 engaging in anelongated slot in the said bolts. The upper ends of the bed posts areprovided with caps 21 and these caps 21 are provided with openings of asize sufiicient to admit the bolts 19. In this way when it is desired toarrange the beds in tiers one above the other the bolt 19 sinks into theopening in the cap 21 and thereby the two beds are sufliciently wellheld together.

Between the two vertical bed posts at one end of the bed there isarranged about the same level as the mattress frame a cross channel iron22 of U-section. The channel iron 22 has its parallel flanges verticaland the flange next to the interior of the bed is smaller than theflange on the exterior. Within the channel iron 22 there is supportedthe end board 23 of the bed. In this Way by arranging the front flangeof the channel iron 22 smaller than the rear flange the end board 28 maybe readily removed, so as to gain access to the irons for cleaning.

lVhen it is desired to collapse the bed into the form shown in Fig. 2the bolts 14: at one end of the bed are raised by hand and the bedposts. are then swung around into the position shown in dotted lines inFig. 1, after which the end posts are laid on the mattress frame in themanner shown in Fig. 2. This form of collapsing is exceedingly usefulfor transport purposes in railway wagons. hen storing the beds howeverin barracks or other institutions it is frequently desirable to provideother methods of collapsing.

According to the present invention therefore the side bars of themattress frame are divided. into sections which are hinged together. Inthe form illustrated three sections are provided and in Fig. 1 it willbe seen that the extreme left-hand sect-ion is hinged to the centersection at 24. This hinge being at the upper side of the side bars. Thecenter section is again hinged at 25 to the extreme right section, thehinge in this case being 011 the lower side of the side bars. Thisarrangement of the hinges en ables the center section to be rotated upwardly into a vertical position while the extreme right section isrotated in a clockwise direction to assume a parallel position as seenin Fig. 4c. The mattress in such a bed is divided into three sectionscorresponding in length to the sections into which the side bars aredivided. The three sections of the mattress may now be piled one on thetop of the other as shown by the dotted lines in Fig. 4. The whole bedis then in an exceedingly compact form for storing in any suitable storeroom.

In order to enable the end section to be folded in the manner describedthe diagonal link 18 is hinged at 26 near its center. To one of theparts of the diagonal link 18 there is fixed a flat spring having aprojection 27, see Fig. 3, which is adapted to engage in a recess in theother part of the link 18. In this way the link 18 is held firmly in theposition shown in Fig. 1. When however it is desired to fold the bedinto the position shown in Figs. at or 5 the operator pulls the fiatspring 28 outward so as to disengage the projection 27 with the lowerpart of the link 18 whereby the link 18 is free to fold about the hinge26.

Owing to the fact of the hinges 2-1 and 25 of the side bars 11 beingarranged one 25 below and the other 24 on the top side of the side bars,it will be seen that the hinge 25, when a load is placed on the sidebars from above, does not tend to bend downward, owing to the two endsof the sections in the neighborhood of the said hinge butting againstone another. The hinge 24, however, being arranged at the top side ofthe side bars is not adapted to resist a force applied from above on theside bars. It becomes necessary therefore to provide a locking device.In the form illustrated the block 31 of the hinge 24: is provided withan extension 32, see Fig. 8, having a hole 33 therein. The centersection is also provided with a hole which in the folded position comesopposite the hole 33 in the extension 32. For holding the sectionsfirmly together it is only necessary to insert a pin 39%, which may besuspended from the extension 32 by a cord 35, through the hole 33 andthe holes 36 in the center section. I11 order to enable the parts to beheld firmly in the collapsed position illustrated in Figs. f and 8 theextension 32 is provided with a part 37 which is adapted to pass throughan opening in the end post and the said part 37 is provided with a holethrough which the pin 3% may be inserted. During collapsing of the bedinto the position illustrated in Figs. at and 8 it is advisable that theextreme left section of the side bar is maintained in a horizontalposition. This is effected by providing a foot 38 which is hinged to theblock 31. The side bars are composed preferably of U-iron and the foot38 is usually nested between the parallel flanges of the U-iron of theside bar. The foot 38 is held in this position by means of a trigger 39controlled by a spring etO. The nose d1 of the trigger is adapted toengage in a suitable opening in the foot 38. When the foot is to be usedthe trigger 39 is pressed outward into the position shown in Fig. 7,whereby the foot 38 is free to swing about its hinged connection withthe block 31.

It is advisable not only to stiffen the hinged connection at asdescribed but also to provide stiffenin means for the connection betweenthe hooked ends of the side bars and the vertical posts 9. The bolts 1%are not sutlicientfor this purpose and therefore I provide a cross angleiron 42 which is adapted, as can be seen in Figs. 1 and 3 to buttagainst the inner flange of the channel iron 22. The construction isthereby considerably stiffened because of the considerable bearingsurface between the angle iron 412- and the channel iron 22.

I claim 1. A bed comprising vertical posts of U- section, a mattressframe having side bars supported from said vertical post-s, hooked endson said side bars, said hooked ends passing between the parallel flangesof the vertical posts and diagonal links pivoted to said side bars andvertical posts.

2. A. bed comprising vertical posts of U- section, a mattress framehaving side bars engaging between the parallel flanges of said U-shapedposts a block fixed between said parallel flanges and on which said sidebars rest, upwardly hooked ends on said side bars, a bolt slidable insaid U-shaped posts and engaging over said upwardly hooked ends anddiagonal links pivoted to said posts and side bars.

3. A bed comprising vertical posts of U- section, a mattress framehaving jointed side bars supported from said vertical posts, hooked endson said side bars and passing between the parallel flanges of thevertical posts and diagonal links pivoted to said side bars and verticalposts.

at. In combination in a bed, vertical posts of U-shaped section. sidebars engaging between the parallel flanges of said U-shaped posts, across U-shaped channel iron between said posts, said channel iron havingits parallel flangesupwardlv directed and its inner flange shorter thanits outer flange and an end board resting in said channel between saidupwardly turned flanges.

In combination in a bed, vertical posts of Ushaped section, blocksbetween the parallel flanges of said posts, horizontal side bars. hookedends on said side bars engaging between the parallel flanges on the bedposts, said ends resting on the blocks be tween the said parallelflanges and said hooked parts being upwardly directed, a movable boltguided vertically between said flanges and engaging over said upwardlyhooked end, a cross piece between the vertical posts at about the levelof said blocks and an angle iron cross piece connecting the ends of saidside bars and adapted to butt against the said cross piece on the bedposts.

6. In a bed, vertical bed posts of U-shaped cross sect-ion, a mattressframe supported from said posts, a cap having a hole therein over theupper end of said U-sectioned posts, a slidable bolt loosely arranged atthe lower end of said posts and of a size to fit the hole in said capfor the purpose set forth.

7. A bed comprising in combination, vertical posts, side bars dividedinto three sections, hinges on the upper side between one of the endsections and the center section, hinges on the lower sides between thecenter sections and the other end sections, hooked ends on said endsections engaging with said vertical posts, means for stiffening saidsections of the side bars, diagonal links pivoted to the vertical postsand to the side bars, said diagonal links being jointed about theirmid-points and means for stifl'ening said jointed diagonal links.

In witness whereof I have hereunto set my hand in the presence of twowitnesses. HEINRICH ACKERMANN. Vitnesses HENRY HASPER, WOLDEMAR HAUPT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, D. O.

